keepalive安装和配置

1、下载安装包并解压

sudo wget http://www.keepalived.org/software/keepalived-1.2.13.tar.gz

tar zxvf keepalived-1.2.13.tar.gz

2、编译安装

cd keepalived-1.2.13

./configure --prefix=/usr/local/keepalived

[如果出现configure: error:

!!! OpenSSL is not properly installed on your system. !!!

则需要先安装openssl和openssl-devel, yum install openssl openssl-devel]

make

sudo make install

sudo cp /usr/local/keepalived/sbin/keepalived /usr/sbin/

sudo cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

sudo cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/

mkdir /etc/keepalived

cd /etc/keepalive

sudo cp /usr/local/keepalived/etc/keepalived/keepalived.conf ./

3、将keepalived添加到开机启动服务中，并进行测试

chkconfig keepalived on

chkconfig --list | grep keepalived

sudo service keepalived restart

修改keepalived.conf文件（smtp_server 改成localhost, router_id变成NodeMaster, virtual_ipaddress 改成你自己网段内且没有被使用的如10.1.xx.xx/24格式的.

运行ip addr查看vip

运行ping命令访问vip。

4、在从服务器上进行步骤1-3

注意：router_id变成NodeBackup，priority变成99, state变成BACKUP，主从服务器要在同一个网段内。

5、加入脚本

vrrp_script chk_mysql{

script "/etc/keepalived/check_MYSQL.sh"

interval 2

weight 2

}

在virtual_ipaddress项前面加上下面段。

track_script {

chk_mysql

}

6、脚本内容

#!/bin/bash

A=`ps -C mysqld --no-header |wc -l`

if [ $A -eq 0]

then

/usr/share/mysql/mysql.server start

sleep 1

if [ `ps -C mysqld --no-header |wc -l` -eq 0]

then

killall keepalived

fi

fi